Electric water-heater.



PATENTED APB.. 7, 1908.

No. 884,343. H. N. ROCHE..

ELECTRIC WATER HEATER.

2 SHEETS-SHBET l.

APPLICATION FILED MAR. 28, 1907.

No. 884,848. PATENTED APR. 7,1908.

H. N. ROCHE. ELECTRIC WATER HEATER.

APPLICATION FILED MAR. Z8, 1907.4

2 SHEETS-SHEET 2.

' g: {ffii/2i, QI,

f i 24 u a -Y 57/ fig ,5 /0

t-hiinble 59 screwed-on the end of a tube 60, the upper end of which is secured b v a stem 61 to a. sliding block 62 ot insulatingr material.

rent passes through said lamp whenever the circuit is closed through the heating coils, thus apprising the operator that the device is being used to furnish hot water.

From the above description it will be readily seen that this device can be used to furnish either hot or cold water, as may be desired. Fig. l shows the parts in A.the position in which the valve is closed, the handle being then in its midway position. On moving the handle upwards into the position shown in full lines in Fig. 2, the valve is opened and the contact rods G3 move away from the heads of the contact screws. so that the circuit remains open. Rut upon moving the handle downwards from its midwav position into the position shown in dott-ed lines 'in Fig 2, which is the saine as that shown in Fig. 3, the rods G3 are nioved into contact with the heads of the screws i5 and the cir.- cuit is closed, so that the heating ot the water commences at the same time the valve is opened to admit ot' the passage of water through the device.` Evidently it is impossible for the circuit Ito be closed and the heating coils to be heated without water passing thereover, so that the danger ot' overheating and burning out said wires is avoided.

In many places it is required by municipal ordinance that electric circuits shall be made .particularly in Fig. 10.

with a snap so that it is impossible for the contact points to remain in such a. position as to permit continued formation of an electric arc between said points. It is to accomplish this result that the switch stem is made with the spring terminal, illustrated more By means of this construction the contact rods are, by their friction and great pressure against` the heads of the contact screws, prevented from Inovling downwards with the switch stem until,

by the downward movement of the latter, the spring 57 has become compressed to such `a degree that, upon overcoming said friction,

the Contact rods move downwards ywith a spring, thus breaking the circuit instantaneously.'4 Itis also to be noted that this circuit is broken not in one place only, but in two, thereby rendering it practicallyT impossible t'or the circuit to be closed accidentally as might be the case if the break was made at a single point only.

I claim zln an apparatus ofthe character described, the combination of a casing, a water conduit therein,an electric heating coil in said conduit, a valve for controlling the passage ot water through said conduit, and means for connecting said heating coil with an electric circuit, comprising a stationary contact, a slidable rod contacting with a second contact and adapted to be moved into contact with the tirst contact andr to be pressed thereon to provide a frictional resistance against the removal of said shdable rod from said contact, a stem for so moving said slidable rod,

and a resilient connection between said stem and rod` subs'tantialhV as described.

In testimony whereot I have hereunto set F. M. WRiGn'r, D. B. RIcHARDs. 

